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激光二极管(LD)大功率端面抽运固体激光器(DPSSL)中的热效应会影响到激光器的各个方面,使得激光输出效率下降,光束质量变坏、谐振腔的稳定性变差等。采用新波段879 nm取代808 nm,将粒子直接激励到激光发射上能级,降低无辐射弛豫过程产生的热量,有效地减少热的产生,降低激光二极管端面抽运Nd∶GdVO4晶体的热效应,获得更高性能的激光输出。在相同条件下通过879 nm激光二极管直接端面抽运及808 nm激光二极管间接端面抽运Nd∶GdVO4激光器的实验比较,结果表明,在较高抽运功率下采用879 nm抽运提高了Nd∶GdVO4激光器的激光输出性能。最后采用879 nm激光二极管端面抽运Nd∶GdVO4晶体棒直线腔方案,在16.3 W的吸收抽运功率下,获得最大连续输出功率9.8 W的TEM00模1063 nm激光输出,对吸收抽运光的光-光转换效率高达60.1%,斜率效率达68.4%。
Laser diode (LD) high-power end-pumped solid-state laser (DPSSL) in the thermal effects will affect all aspects of the laser, making the laser output efficiency decreases, the beam quality deteriorates, the stability of the resonator worse. The new band 879 nm was used instead of 808 nm to directly excite the particles to the upper level of laser emission and reduce the heat generated by the non-radiative relaxation process, effectively reducing the generation of heat, reducing the thermal effect of Nd: GdVO4 crystal on the end face of the laser diode, Get higher performance laser output. The experimental results of Nd: GdVO4 laser by 879 nm laser diode direct end-face pumping and 808 nm laser diode indirect end-face pumped Nd: GdVO4 laser under the same conditions show that Nd: GdVO4 Laser output performance of the laser. Finally, a Nd: GdVO4 crystal rod laser with 879 nm laser diode end-pumped was used to obtain a TEM00 mode 1063 nm laser output with a maximum continuous output power of 9.8 W at an absorbed pumping power of 16.3 W. - Light conversion efficiency of up to 60.1%, slope efficiency of 68.4%.